To access the contents of a .rar file, you cannot use the default tools built into Windows or macOS. You will need a third-party extractor:

: Creators can password-protect their packs to ensure they are only accessed by intended users.

In most online communities, a "custom pack" refers to a curated selection of files designed to modify or enhance a specific user experience. Depending on the context, these archives usually contain:

Since "custom pack.rar" is a very common name, it is frequently used as a placeholder by malicious actors. before opening them, especially if you downloaded the pack from an unverified source or a public forum.

: It often results in smaller file sizes than the standard .zip format, making it faster to download.

: A series of community-made patches or plugins bundled together to ensure compatibility. Why use the .RAR format?